This document provides an introduction to sociolinguistics. It discusses how sociolinguistics examines the relationship between language and society, exploring how social factors influence language use and how language variations exist between social groups. Some key topics covered include the differences between micro and macrolinguistics, sociolinguistics versus the sociology of language, social factors that determine language choice like participants and setting, and social dimensions of language like solidarity scales. The conclusion emphasizes that sociolinguistics research how language is used in a community and how social relationships and contexts influence linguistic variation and choices in vocabulary, sounds, words and grammar.